Plate tightener and fastener



F. A. GARNER. TIGHTENERAND FASTENER.

CATION FILED AUG.26, I919.

Patented Oct. 12, 1920..

2 SHEETS-SHEET I.

PLATE APPLI F. A. GARNER.

PLATE TIGHTENER AND FASTENER.

APPLICATION FILED AUG.26, I919.

Patented Oct. 12, 1920.

2 SHEETSSHEET 2.

1! wil 1' $29- w w 'lwvowtoz fled Q. Garner UNETED STATES PATIENT. ,OFFICEL;

FREDERICK A. GARNER, or OAKLAND, CALIFORNIA, nssienoaor ONE-THIRD To WALTER vmcnn'r NUGENT, or oaiznnnnjcemromirn.

PLATE TIG-I-ITENER AND FASTENER.

Application filed August 26,1919. Serialli'o; 319,874..

fastening steel plates to a bolt during the course of its construction before it is riveted. During the construction of a bolt the steel plate must first be placed inthe desired position; then it is bolted there by means of bolt and nut, and washers to fill extra space, the bolt generally being longer than the two pieces to be riveted together are in thickness; and then the bolts are inserted in the rivet holes which-have been previ-' ously made before the plate is put in place. The customary method is very inefiicient because the threads of the bolt are stripped and the nuts are rounded off on the corners due to the constant pulling and hammering. The steel having been put in place, bolted up, and then riveted, the boltsare taken out but the operation is a very slow one for the method followed is to keep hitting the nut with a hammer or wrench. The threads on the ordinary bolt are not strong enough to stand this strain.

lV ere the threads hard enough the bolt would break. 'The disadvantages are obviated by my invention,

illustrated in the accompanying drawings,

heavy round head 2 and tapered end 3..

Member 1 is provided with a slot l, the upper edge of which is beveled while the lower edge of the slot is parallel with the head 2. I provide locking plates 7 and 8, each having a beveled edge 9. Locking plates 7 and 8 bear against washers 5 and 6. Washer 5 bears againstthe steel plates AV and B which are to be drawn together and Specification of Letters Patent. Pate t d O t 12 1920 tightened by 'my device preparatory to riv} etmg. I provide a releasing key 11 having one edge beveled to correspond with the beveled edge of; slot tin which key 11- is adapted to be inserted. A suitable .opening 12 of key, 11 admits of the insertion of a suitable fastening member such as the ring '13. Looking plates 7 and 8 are provided with elongated, slots 10, as illustrated in Figs. 2 and 4. The flat surface 14 of looking plates '3' and. 8 hold those members in place after being driven tojits seat. In other words the locking plates are vpartially the nature of wedges. These plates are placed between "the washers 5 and 6 with the wedge endsonly partially inserted, and

are thereafter-driven to seat the flat surfaces 1% under the washers a shown in Fig. 1, thereby forcing steel plates A and B tightly into contact by reason of the, tension between the heavy rounded head 2 and the key 11 which has previously been inserted through slot4 of the plate fastener 1 in which position it is held by ring 18; By

liavingthe slot at tapered it ispossible to readily release key 11 by tapping the key on its small end, thereby releasing the whole contrivance and permitting the plate fastener or pin 1 to be'withdrawn. Ring 13 is utilized as a safety device, though not absolutely necessary. The pin itself can be used as a drift pin, it being tapered so that 1t can be driven into a rivet hole when therivet hole is not large enough for the rivet desired to enlarge the rivet hole. Plate fastener 1 is without threads. Its slot 4; has

its parallel edge adjacent the washer so that it cannot possibly have any drawing power on the washers.

" My releasing-key 11 is placed in position for my beveled slot is to get the greatest releasing posslbilities for the releasing key,-

when it is under heavy strain of locking plates, washers and steel plates that have been drawn together by thelocking plates. This drawing powerv 'is extraordinarily great. In my device the strain is equally ciivideel forthe reason that the angle is 10- ,cated difierentl y and for a difierent pur-v pose than the boltloek (see Fig. 3),

A peculiar and one1of the most essential features in this invention 7 is the locking .plate, so constructed that it may be usedslightly-or in series. This locking-plateis absolutely new, 2 he looking plates exert the drawing power. r

The disk-shaped head 2 is very sgwaiuable above others for, the reason of its superior strength.- -In'most1 bolts different shaped heads are used forfthereason' they must have something to holdto, to keep the bolt from turningfwhflethey are putting on a nut; Inthisbase' it does not turn, conse- I shaped to receive a tapering key, a taper- I ingkey, ,a key-fasteningmemher adapted to be inserted in the key to prevent its accidental loosening, washers on the pin, and

one or more tapering locking plates, said locking plates having'an elongated slot of sufficient width to permit of the plates being slidontothe pin.

' FRED. AQGARNERL I qiiently a roundhead Will be stronger and p 

